<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        [v-cloak]{
            display: none;
        }
    </style>
</head>
<body>
    <div v-cloak id="app">
        {{msg}}
    </div>

</body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    const vm =new Vue({
        el:'#app',
        data:{
            msg:" hello world"
        }
    })
</script>
</html>